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Master of HVAC: The Ultimate Heating & Cooling Maintenance Quiz
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What is the primary purpose of a flame sensor in a gas furnace?
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Hint
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50-50
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Audience
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A
To measure the temperature of the indoor air
B
To detect the presence of a flame and shut off the gas valve if no flame is detected
C
To ignite the gas burners
D
To sense carbon monoxide leaks
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